Helen Cory, 71, was found dead inside a home that had caught fire in October 2004 in north Harris County. Arson investigators later determined the fire had been deliberately set. Investigators now say they've exhausted all of their leads in the case and are asking for any tips from the public.

If you have any information, you're asked to call Crime Stoppers at 713-222-TIPS. A $5,000 reward is being offered for information that leads to an arrest.